Mounting for a high speed cutting tool



'Apri127, 1937. DE FOREST A. LAPHAM 2,078,359 I MOUNTING FOR A HIGH SPEED CUTTING TOOL Fild Marches, 1955 TIWENT D H 4 2/ /3' WITNESS T rulmzy h Patented p 1937 w MOUNTIN FOR.

' a ForestA."Lapham, Syracuse, N. Y. l Application March 23, 1935, swam- 12,152 I scam (o1; 90-47) fl'Ihisf invention relates to improvements in a universally adjustable mounting for a" high speed a cutting tool in which a tool spindle 'and an electric motor are supported bya common housing in cooperative relation with each other;

An object of the invention is to provide a high speed tool mounting. that maybe readily detachably secured to a conventional mechanism u ed in the manufacture of articles from metal,

f 110 wood fibre, and so forth, and which has a work supporting table such as a milling machine.

' "Another object of the 'invention'is to provide a mountingof theabove mentioned classwhich maybe universally adjusted wherebythe tool maybe moved to anrrediiired angularposition for advantageously engaging thework. l

I In carrying out the above mentioned objectsL I haveprovideda supporting housing or frame for" a thetool spindle and motor. which may be revolved 360 in either directionLabout both' of a ,pair ofintersecting axes extendlng normal to h each Other:

{A urther object resides in mounting the tool a spindle and motorimbalanced relation at diametrically opposite sides of thef point of inter.-

section or the axes of revolution thereof, whereby the toollspindle may bequickly and easily ad justed to any required angular position and be secured thereintfwith a minimum {amount of physical efiort or rnechanicalskill. it

a Still other objects-of. the invention are to provide a universally adjustable mountingfor high speed cutting tools that islight, durable and a economicalinconstruction and whichis simple iifiandeflicient in operation. 1 Otherobjects and uses relating tothe specific partsoi the mechanism will be brought out in "the" following description taken -in connection l with: the accompanying drawing in whichz.

Figure 1 is anend elevation of anadjustable ing the'various features of this invention,

. l Figureis a front elevation partly section line 4-4, Figure 2. 1

" Figure 5 is alongitudinal sectional view taken odthrough' the housing in substantially'theplane of the line 5--5,Figure ll a l l J'I'he devlceasillustrated inthe drawing comprises primarily a. housing8, a bracket!) and an electric motor ll. The housing lis a one-piece ci member having an elongated? endportion l2:

fr'nouritlng for ahighspeed cutting tool embody-,

forming a casefor a tool spindle 'l 3, anjtopposite hollow end "portion 14 providing a support for the motor l0 and an intermediate cylindrical bearing portion'li adapted tobe rotatably engagedbythe bracket 9. The interior of the end portions, 12 and I4 and the cylindrical portion 15 of the housing 8 are all in communication with each other as clearly, illustrated in Figure 5,

while the wall of the end portions l2 and Mare preferably provided with spaced openings l1 and I8 respectively in the walls thereof to provide-air passages which are also conducive to lightness in structure. l n

The spindle I3-extends longitudinally through v the elongated end portion I2 of the housing in a plane at substantially right angles to the axis of the cylindrical portion I5 and has secured in any suitable manner to one endthereof a chuck 20 for releasablymaintaining a cutting toolyas a drill or'the like, in operative relation with the spindle l3; The spindle I3 is journaled in axially spaced-rollingbearings 2i and 22 mounted-in the end portion l2 adjacent the respective end of thespindlel3. One of the bearings as 21 is arranged'at the lower or chuck end of the spindle and is mounted directly in theend portion of the housing between a shoulder 23" provided therein and aunt 24 screw threadedto the housing endas illustrated .in Figure 5. The inner ball race of the bearing 2| is as shown preferably clamped to the spindle liibetween a shoulder l3 and a nut 26 so that the bearing and'spindle may be assembled prior. to mounting the same in the housing end I 2. Also, it will be noted that this bearing structure maintainsthe spindle and housing against relative axial movement when theyare assembled together; i a

shown at either sldelof the bearing 2| for preventing the passage of oil or other lubricating means for the bearing- 2| along the spindle l3.

The other bearing '22Jis mounted as shown in a "recessz'l provided inabearing supporting mem; ber 28 which is secured'to the upper end of the Figure 5, by screws 29or their equivalent. The upper end-of the spindle extends outwardly 7 through thebearing supporting member 28 and the .adjacentnportion 101' the upperjor outer end 'ofsaid supporting member mayes shown be V provided witha packing member, 30 for prevent end portion 12 0f the housing as illustrated in sing the escape of .a lubricant between said supgporting memberand'thespindle.

w A multiple speed .pulley 321s mounted .upon

the spindle l3 intermediate the bearings 2| and 22 in alignment with the interior of the end portion l4 of the housing. The pulley 32 is secured to the spindle i3 so as to be rotated thereby, by a pair'of keys 33. The keys are arranged at the lower end of the pulley in angular relation to the axis of rotation of the spindle and pulley so that the pulley will be maintained thereby against longitudinal movement along the spindle in one direction. The pulley is yieldingly maintained in operative engagement with the keys 33 and against axial movement along the spindle in the opposite direction by a spring 34 mounted on the spindle I3 between the upper end of the pulley and a sleeve 3| slidably mounted on the spindle in contact withthe upper bearing 22 as shown in Figure 5. A nut 35 is screw threaded on the upper end portion of the spindle l3 in engagement with the outer face of the bearing 22 to hold the bearing and sleeve 3| in predetermined relation on the spindle against the action of the spring 34. This novel manner of mounting the pulley 32 and bearing 22 on the spindle I3 not only contributes to the ready assembling thereof in the housing but also permits a certain degree of latitude in the spacing of the pulley and bearing 22 without precision in the machining of the abutting surfaces of the pulley, sleeve and bearing.

The pulley 32 is operatively connected by a belt 36 with a reversally arranged multiple speed pulley 31 positioned within the-inner chamber of the end portion 14 in operative alignment with the pulley 32 upon the drive shaft 33 of the motor l3.

The motor l3 in-this instance has secured in any suitable manner to one end thereof a supporting plate 43 which normally rests upon one side surface of the end portion 14 of the housing 3. The plate 43 is adjustably secured to the housing by means of a pair of clamping studs or screws 42 and 43 which are screw threaded in said plate at diametrically opposite sides thereof. One of the screws as 42 extends upwardly through a circular hole provided in the adjacent portion of the housing end l4, to be rotatably supported thereby, while the other screw 43 extends upwardly through an elongated arcuate.

slot 44 provided in the adjacent portion of the housing end, said slot being concentric with the screw 42 whereby upon loosening the screw 43 the plate and motor may be swung about the screw 42 as an axis for adjusting the shaft 33 relatively to the spindle l3. 7

The side wall of the end portion "of the housing adjacent the motor I3 is provided with an enlarged opening 46 through which the motor shaft 33 extends and which permits ready ad- Justment of said shaft relative to the spindle l3. The opposite side of the housing end portion I4 is provided with a similar opening 41 co-axial with the opening 46 and which is of sufficient diameter to permit the pulleys 32 and 3'Ito be passed therethrough when mounting said pulleys within the housing 3.

It will be seen, therefore, that when it is necessary to assemble a pulley 32 upon the spindle l3 said. pulley may be entered into the interior of the housing through theopening 41 before the motor l3 and pulley 31 are mounted in position and then passed through the interior of the cylindrical portion 15 into alignment with the spindle l3, whereupon said spindle maybe moved axially through the central opening of the pulley 32 and then the pulley and spindle are secured in position by the nut 35, bearing 22, sleeve 3| and spring 34. If, however, it is necessary to change or replace the belt 33 this may be readily accomplished by first removing the bearing supporting member 23 from the hous- 5 ing and then inserting the belt through the opening thus provided into the interior of the housing, whereupon said belt may be brought into desired operative relation with the multiple speed pulleys 32 and 38. I

The bracket 3 in this instance, comprises a tubular body portion 53 adapted to receive therein one end of a fixed supporting element of the machine with which the mounting is to be used, such as an over-arm A indicated by broken lines in Figure 4. The body portion 53 is provided with a split portion 53 intermediate the ends thereof which is adapted to be brought into frictional engagement with the supporting member A by a clamping screw 5! which passes through aligned openings provided in adjacent sections of the split portion 53 and screw threaded in one of said openings.

It will thus be seen that the bracket 3 may be rotatably adjusted to any desired position about the supporting member 3 and secured in the adjusted position by the manipulation of the screw 5|. In order that the degree of adjustment of the bracket 3 relative to the support A may be readily determined, I have rotatably mounted upon the inner end of said bracket a collar 53 which is rotatably secured to the body of the bracket by a screw or stud 54 mounted in a portion of the collar over-lapping the body 53 and which is in engagement with an annular recess or groove 55 provided in the peripheral surface of said body portion adjacent the rear or inner end thereof. The collar 53 extends some distance beyond the body 53 and is provided with an interior bore adapted to receive the supporting member A therethrough while one or more clamping screws as 51 is screw threaded into the collar for frictional engagement with the support A to maintain said collar against rotation during the rotation of the bracket 3. The adjacent portions of the body 53 and collar 53 may as shown in Figure 1 be provided in the peripheral surface thereof with an indicating mark 53 and a graduated scale 63 respectively for assisting in determining the degree of relative rotation of the body 53 of the bracket and the support A and collar 53.

The opposite or outer end portion of the body 53- is provided with a semi-circular recess 32 adapted to receive the cylindrical portion l5 of the housing therein. A semi-cylindrical cap 63 also adapted to receive the cylindrical portion l5 of the housing therein is secured in cooperative relation-with the recessed end of the body 53 for securing the-cylindrical portion of the housing to the bracket.-, The cap 63 in this instance is removably secured to the body 53 by a pair of clamping screws 54 which extendthrough dia- ,metrically disposed aligned openings provided in the body portion 53 and cap 63.,"The relation of the cap 63 and recess 62 to the periphery. of the cylindrical portion l5 of the housing is such that when the cap 63 and body 53 of the bracket are securely clamped to each other that the housing will be frictionally engaged thereby to maintain said housing and the bracket against 7 relative rotary movement. .The axial length of 1 1 the. cylindrical portion 15 is defined by a pair 'of equal to the width of the cap 63 and recessed end portion of the body 5|] so that when the housing is mountedupon the bracket 9 said housing will be maintained by the flanges 66 against lateral movement relative to the bracket 9. An edge portion of the cap 53 and the periphery of the adjacent flange 66 may as shown in Figure 2 be provided with indicium 68 and a graduated scale 69 by whichlthe degree of relative rotary movement of the housing 8 and bracket 9 may be readily determined.

It will now be observed that by loosening the clamping screw 5| the bracket 9 and the housing 8 may be rotated in either direction 360 or any fraction thereof about the axis of the supporting member A for bringing the tool as B carried by the spindle l3 and chuck into any required angular position about the axis of the support A relatively to the work and the housing and tool may be secured in the adjusted position by merely turning the screw 5| to tighten the same. Furthermore, the tool as B may be brought into any angular position about the center of the cylindrical portion l5 as an axis by loosening'the screws 64 and the cap 63 and then rotating the housing relativelyto .the bracket 9 after which the housing may be secured in the adjusted position by tightening the screws 64.

It will thus be seen that by utilizing both of these adjusting means the tool may be brought to any required advantageous angular position relative to the work within the range of said tool and that the tool will be operated as efficiently in one position as in another.

Furthermore, it will be observed that due to the motor l0 being mounted directly to the housing 8 at the diametrically opposite side of the axis of rotation of the bracket 9 to that of the spindle I3 the spindle and motor are thus counter-balanced to a very marked degree which permits the easy rotation of the housing and these members about the axis of the bracket 9 and the ready close adjustment thereof necessary to obtain the correct position of the drill relative to the work.,

' Also, it will be noted that, inasmuch as the drive connection between the motor 10 andthe spindle I3 is mounted in a plane substantially mid-way between the bearings 2| and22 for I supporting the spindle I3, the operation of the tool carried by said spindle will be effected with a minimum amount of vibratory movement of said tool and thereby contributes to the maximum efficient operation of the device.

spirit of the invention as set forth in the appended claims.

I claim: 7 1. In a machine of the class described, a

bracket member, adapted to be rotatably and adjustably connected with a fixed support to rotate about a horizontal axis, a housing member rotatably and adjustably connected intermediateits ends with said bracket to rotate about an axis extending at right angles to said horizontal-axis, a tool spindlejournaled in the housing at one side of the horizontal axis of rotation of the bracket member, an electric motor secured to the housing at the opposite side of said horizontal axis with the armature shaft thereof extending into the housing in parallel relation with the spindle, and means mounted wholly within the housing and including a drive belt for operatively connecting the motor with the tool spindle.

2. In a high speed cutting tool mounting adapted to be removably attached to a milling machine or the like having a work supporting table and a non-rotating carrier member, in combination, a tool spindle, supporting means for the spindle including a pair of elements rotatably connected with each other and with the carrier member to permit the spindle to be revolved 360 in either direction about both of a pair of intersecting axes extending substantially normal to each other, means releasably securing said first mentioned elements to each other topermit relative rotary adjustment thereof, a third element, separate ,means adjustably securing one of said first mentioned elements and the third mentioned, element to the carrier member whereby said elements may rotate independently of each other and of said carrier member, said first mentioned elements being provided with graduations'on adjacent surfaces thereof coacting for indicating the degree of relative rotary movement of said elements aboutone of said axes, and separate graduation marks provided on adjacent surfaces of the third mentioned element and the adjacent one of the first mentioned elements coacting for indicating the degree of relative rotary movement thereof about the other one of said axes whereby the degree of revolution of the spindle about said axes may be accurately determined with respect to the work supporting table. I

3. In a high speed cutting tool mounting adapted to be removably attached to a milling mentioned element to the carrier member wherei by said elements may rotate independently of each other and of said carrier member, said first mentioned elements being provided with graduations on adjacent surfaces thereof coacting for indicating the degree of relative rotary movement of said elements about one of said axes, and separate graduation marks provided on adjacent surfaces of the third mentioned element and the adjacent one of the first mentioned elements coactingfor indicating the degree of relative rotary movement thereof about the other one of said axes whereby the'degree of revolution of the spindle laboutisaid axes may be accurately determined with respect to the work supporting table, and means connecting said third element to said adjacent one of the first mentioned elements and coacting to permit free rotation of said elements relative to each other.

DE FOREST A. LAPHAM. 

